## Abstract

The effect of mixed convection in the entrance region of symmetric, finite circular rod bundles has been studied. The problem has been solved using the boundary fitted coordinate system. It was found that when buoyancy aids the flow the Nusselt number increases and when buoyancy opposes the flow the Nusselt number decreases. The percentage increase in Nusselt number due to buoyancy aiding the flow depends on whether the peripheral rods are closer to the central rod or to the channel wall. The largest increases occur when the peripheral rods are crowded near the central rod. The smallest increase occurs at a peripheral rod radius which has the largest forced convection Nusselt number.

Original language | English (US) |
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Pages (from-to) | 67-75 |

Number of pages | 9 |

Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |

Volume | 102 |

State | Published - Dec 1 1988 |

Event | Thermal Hydraulics of Nuclear Steam Generators/Heat Exchangers - Chicago, IL, USA Duration: Nov 27 1988 → Dec 2 1988 |

## ASJC Scopus subject areas

- Mechanical Engineering
- Fluid Flow and Transfer Processes